Comment 7 for bug 591909

Attached is a working configuration for LVM + RAID partitioning.

Note that extended partitions must be used for the LVM physical device (changing this to primary and using sd[ab]2 failed miserably). And also note that you need to use LBA alignment either from a boot param (preferred) or from the preseed file (not tested by me but it should work).

Enjoy

p.s. this bug should be closed after you (ubuntu devs) decide whether to enable LBA alignment by default in the d-i (doubt it) or fix mdadm so it doesn't get confused by partitions whose cylinder appear to be overlapping (likely). This also means that this bug should affect mdadm as well.